A Backstreet Boy Will Compete on 'Dancing With the Stars' Season 21

After being asked numerous times to join Dancing With the Stars, this Backstreet Boys heartthrob will finally be vying for the coveted mirror ball trophy.

Nick Carter has agreed to compete in season 21 of the ABC show after turning down offers from the DWTS crew for four years in a row, Us Weekly confirmed on Wednesday.

WATCH: The Best Marriage Advice That Jordan Knight Gave Nick Carter

So who convinced the 35-year-old pop singer? Carter tells Us that it was NSYNC's Joey Fatone -- who competed on seasons 4 and 15 of DWTS -- that talked him into hitting the dance floor.

"He talks about it all the time and I was really debating if I wanted to do it, and he said, 'It's a great experience, it keeps you in shape and it'll teach you a lot of stuff,'" Carter said of his boy band rival and friend. "He said, 'You'll get what you put into it.' And I'm a hard worker, so I think it'll be fun."

MORE: Nick Carter Lets It All Hang Out In a Blue Thong

In addition to Fatone's endorsement of the show, Carter's little brother, Aaron Carter, also competed on season 9 of DWTS and placed fifth with pro partner Karina Smirnoff.

"My brother was on it; he did great; and he's a great little dancer and entertainer so I saw it through his eyes throughout that experience," he said of his baby bro. "And there's a lot of competitiveness in me and I think there's a little something inside of me that says, 'Okay, I'm going to go there and represent the Carter name and do even better than what he did!'"

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While many fans of the show might think Carter has a leg up on the competition thanks to all the dancing he does with the Backstreet Boys, the singer admitted that he's still nervous.

"I never considered myself a great dancer. Even though funny enough I've danced my entire life, I might have had a little insecurity on that end," he said. "But I felt this time around I had some time and I think it'll be a cool experience. I think they can teach me some stuff."

Carter is the third celebrity to be announced for season 21 of DWTS. The daughter of Crocodile Hunter Steve Irwin, Bindi Irwin, and triple crown disc jokey Victor Espinoza have also been confirmed to compete.

WATCH: FLASHBACK! Aaron Carter Gets Trapped in Leather Pants

Two more contestants will be revealed on Entertainment Tonight tomorrow, August 27!

Dancing With the Stars premieres Monday, Sept. 14 at 8 p.m. ET on ABC, and the remaining contestants will be revealed on Sept. 2 on Good Morning America.

Do you think Carter is a right fit for DWTS?

Bindi Irwin is 'Dancing With The Stars' Season 21's First Contestant!

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